{
  "manageEntity": {
    "action": "Save",
    "entityId": "635367338",
    "entityType": "Track",
    "nonce": "0x4b42021192da6ca051dcf858afe8adccff4ccd3757f9ab967f8d389e2e01e829",
    "signature": "0x20302c569bf7c212d20b5a14fc3f4ece6b51cec4f669106a9426182ca17069622239e9b95a28291b0164b12ed1715e70af8f259105ca8805c1c3634503f2987d1b",
    "signer": "0x722b43224Dbc7d6931b3C690696EF03933374bff",
    "userId": "772126389"
  }
}